在SARS-CoV-2尖端蛋白诱导时间依赖和大脑区域特定的变化铁死标记:K18-hACE2小鼠的初步研究
Asmaa Yehia1,2, Chirine Toufaily1, Dalia M Abdel Ghaffar2
1Department of Neuroscience, Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Phoenix, AZ 58054, USA.
International journal of molecular sciences
|February 13, 2026
概括
后COVID综合征可能涉及ferroptosis,一个细胞死亡过程. 随着时间的推移,SARS-CoV-2尖端蛋白在小鼠的鼻腔内注射显示了特定大脑区域的变化铁亡标志物.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 后COVID综合征呈现持续的神经精神疾病症状.
- 后COVID综合征的病理生理学仍然不清楚.
- 铁,以铁失调,抗氧化剂失败和脂质过氧化为特征,与COVID-19有关.
研究的目的:
- 调查SARS-CoV-2尖端蛋白暴露与不同大脑区域的铁亡标记物之间的关联.
- 为了评估随着时间的依赖性和区域特异性的变化,铁亡相关的蛋白质在尖端蛋白的管理后.
主要方法:
- 转基因K18-hACE2小鼠接受了SARS-CoV-2尖端蛋白S1亚单元的鼻腔注射.
- 在2,6周和12周,在四个大脑区域 (海马体,前额皮质,小脑,嗅觉球) 量化了铁亡标记蛋白表达.
- 使用传输电子显微镜 (TEM) 进行超结构分析,对海马和前额叶皮进行分析.
主要成果:
- 观察到铁处理,抗氧化剂和脂质过氧化标志物的区域和时间依赖的调制.
- 在不同的大脑区域和时间点中,观察到FPN1,TFR1,DMT1,GPx4和MDA结合蛋白等标记物的特定变化.
- 在TEM中,海马体和前额叶皮层中发现了符合ferroptosis的特征.
结论:
- 暴露于SARS-CoV-2尖端蛋白质可能会诱导铁死标记的时间依赖性和大脑区域特定的变化.
- 这些发现表明铁死在COVID后神经症状的病理生理学中可能发挥作用.
- 需要进一步的研究来证实这些初步发现,并探索临床影响.
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